Removed symlink, which was problematic on OSX

This change is untested, but assumed to work; only 3 plain-text files made reference to this path, and they have all been updated.

The problem on OSX is as follows: checking out the latest code on OSX results in a problem with the symlink, where a file always appears to be locally modified:
```
$ git reset --hard origin/master
HEAD is now at 9932fd7 Wrote JointController (name will change...).  This controller uses actual goemetric models for the joints and datasheet-based models for the valves to produce much more accurate predictions of control inputs.  In simulation it is a substantial improvement over pure PID based on angle.
$ git status
# On branch master
# Changes not staged for commit:
#   (use "git add <file>..." to update what will be committed)
#   (use "git checkout -- <file>..." to discard changes in working directory)
#
#	typechange: Firmware/BaseEthernetNode/prm/project_cw10.lcf
#
no changes added to commit (use "git add" and/or "git commit -a")
$
```

This local "change" prevents git from being able to fetch the latest version of code. 

Modifying the git config with `core.ignorecase=false` and `core.symlinks=false` does not fix this.

The included patch removes the symlink (which seemed to be simply a workaround that provided case-insensitivity), and updates all references to the old filename.